Local Unions

Members of these local unions apply insulation to pipes, tanks, boilers, ducts, refrigeration equipment and other surfaces requiring thermal control of temperatures. The responsibilities of these mechanics, improvers and apprentices also include the manufacture, fabrication, assembling, molding, erection, spraying, pouring, mixing, hanging, preparation, application, adjusting, alteration, repairing, dismantling, reconditioning, corrosive control, testing and maintenance of heat or frost insulation. Workers also handle insulation materials made of fiberglass, rubber, calcium silicate and urethane. Insulators also do removal of asbestos containing material.


International Association of Heat and Frost Insulators and Allied Workers

9602 Martin Luther King, Jr. Highway
Lanham, MD 20706

Insulators & Allied Workers Local 5

3855 Ebony St
Ontario, CA 91761
(909) 390-3401

Insulators & Allied Workers Local 16

3801 Park Road
Benicia, CA 94510
(707) 748-1616